Hair dryer



FIG. 1 is a top plan view of a hair dryer showing my new design;

FIG. 2 is a side elevational view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a back elevational view thereof; and

FIG. 5 is a bottom plan view thereof. 

The ornamental design for a hair dryer, as shown and described. 